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研究生:林曉青
研究生(外文):Hsiao Ching Lin
論文名稱:醋酸乙酯反應蒸餾製程之動態模擬
論文名稱(外文):Dynamic Simulation of an Ethyl Acetate Reactive Distillation Process
指導教授:黃琦聰
學位類別:碩士
校院名稱:東海大學
系所名稱:化學工程學系
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:74
中文關鍵詞:反應蒸餾酸醇比滾雪球效應模組化架構
相關次數:
  • 被引用被引用:1
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本研究乃針對醋酸乙酯反應蒸餾系統以Aspen Plus設計一整廠穩態模式;將反應蒸餾塔和回收塔與以連結。爾後,再以Franks(1972)之模組化架構,在整廠操作下建立一動態模擬程式,並進行動態之模擬測試。在進行動態模擬之前,首先對此系統建立二種基本控制架構並比較其差異。其中有一種基本控制架構因沒有考量回流量和庫存問題,因此在穩態下操作則會產生“滾雪球效應”。另一種控制架構,因為有考量到回流量和庫存的問題,則無此“滾雪球效應”之現象;因此,本研究以此架構作為動態特性的探討對象。在此基本控制架構下對此系統進行干擾之動態測試,而由模擬結果發現系統中的醋酸含量和進料之酸醇比為影響反應蒸餾塔塔頂醋酸乙酯濃度之最主要因素。酸醇比越高其醋酸乙酯濃度越高,且應維持進料醋酸組成於高濃度。

Chemical reactions and multistage distillation can be carried out simultaneously. This combined unit operation, called reactive distillation, is specially indicated for those chemical reactions where equilibrium limits the conversion to low and moderate level. The ideal of reactive distillation is not new; however, it has received renewed attention in recent years. According to Malone and Doherty (2000), a lot of articles concerning the reactive distillation have been published during last two decades. However, most of these publications are concerning about process design, chemical reaction, and equilibrium, etc. Only very few of these results guide to practical decision on operating strategies, control system design, instrumentation, etc. Accordingly, the main purpose of this study is to explore the dynamics of the ethyl acetate reactive distillation process. First, a steady-state design for an ethyl acetate reactive distillation process including recovery columns using Aspen Plus software was proposed. Then, a rigorous dynamic simulation model for the sysem based on Franks’(1971) physical approach was developed. Dynamic simulation and controllability studies for the reactive distillation processes with several control strategies were also investigated. It was found in this study that if the control scheme is not proper arrangement in the recycle and inventory problems, it may cause “snowball effect”. In addition, a base plantwide control scheme for the ethyl acetate process is proposed in this study. Dynamic simulation has demonstrated that the proposed base control scheme can maintain the process in stability under difference load disturbances without “snowball effect”. Moreover, it was also found in this study that the higher the acetic acid to ethanol ratio in the feed, the higher the ethyl acetate concentration in the product.

第一章 緒論
第二章 文獻回顧
第三章 醋酸乙酯之熱物性質
物理性質
反應動力學模式
熱力學模式
液相之熱力學模式
氣相之熱力學模式
第四章 穩態設計
第五章 反應蒸餾之動態模組化
基本假設條件
平衡板之模式化
再沸器之模式化
分相器與冷凝器之模式化
相平衡計算
數值方法
計算流程
第六章 動態模擬與基本控制
第七章 結論與討論

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